

public class Calc {
       public static void main(String [] args) {

                 int result=0;

                 if (args.length != 3) {
                         System.out.println("Usage: java Calc operato1 operand(+ - * / %) operator2");
                 }


                 switch (args[1])
                 {
                     case "+":
                         result = Integer.parseInt(args[0]) + Integer.parseInt(args[2]);
                         break;
                     case "-":
                         result = Integer.parseInt(args[0]) - Integer.parseInt(args[2]);
                         break;
                     case "x":
                         result = Integer.parseInt(args[0]) * Integer.parseInt(args[2]);
                         break;
                     case "/":
                         result = Integer.parseInt(args[0]) / Integer.parseInt(args[2]);
                         break;
                     case "%":
                         result = Integer.parseInt(args[0]) % Integer.parseInt(args[2]);
                         break;
                     default:
                             System.out.println("err!");
                             break;

                 }





                System.out.println(args[0] + " " + args[1] + " " + args[2] + " = " + result);

            }
  }